2'-O-acetyl-4''-O-(3-oxopropyl)-6-O-methyl-11-desoxy-11(R)-aminoerythromycin A 11,12-carbamate

2'-O-acetyl-4''-O-{3-[3-(3-carboxy-1-dimethylamino-4-oxo-1,4-dihydro-quinolin-6-yl)-propylamino]-propyl}-6-O-methyl-11-desoxy-11(R)-aminoerythromycin A 11,12-carbamate